Zettl, Anton Recent developments in Sturm-Liouville theory Berlin : De Gruyter, 2021. xii, 245 p. -- (De Gruyter studies in mathematics ; vol. 76) QA379 Z47 |
Zettl, Anton Recent developments in Sturm-Liouville theory Berlin : De Gruyter, 2021. xii, 245 p. -- (De Gruyter studies in mathematics ; vol. 76) QA379 Z47 |